The Anchor Hocking TrueSeal Food Storage Sets, 4 Piece Rectangular Setis a set of four rectangular glass storage containers, each of 4 and a half cup capacity. The containers are made of tempered glass and are stain-resistant and can go in microwave, oven, dishwasher and freezer. The lids are made of plastic and are airtight and BPA free. The lids should be washed in the top rack of the dishwasher, or hand washed.

Anchor TrueSeal earned a perfect score for airtightness from the Good Housekeeping Research Institute. These glass containers are made in the USA.